Tappet for stamping-mills.



PATENTED JUNE 26, 1906.

W. MGDO TAPPET FOR STA G MILLS.

, m.. w WM w MAV ad@ l/ .f M M ma MEZ i007 UNITED STATES PATENT OFFICE.

WALLACE MODONALD, OF GRASS VALLEY, CALIFORNIA.

n TAPPET Fon sTAwlPlNe-MILLS.

Specification of Letters Patent.

atenteol June 26, 1.906.

T0 @ZZ whom, it may concern,.-

Be it known that I, WALLACE iNIoDoNALD, a citizen of the United States,residing at Grass Valley, in the county of Nevada and State ofCalifornia, have invented certain new and useful Improvements in Tappetsfor StampingMills; and I do declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same.

My invention relates to improvements in tappets for stamp rods or stemsof ore-stamping mills and it consists in certain novel features ofconstruction, combination, and arrangement of parts hereinafterdescribed and claimed.

The object of my invention is to provide a simple, practical, andeffective fastening means for securing a tappet to a stamp rod or stemso that the tappet may be readily removed without interfering with theusual guides for its rod or stem.

The above and other objects, which will appear as the nature of myinvention is better understood, are accomplished by the constructionillustrated in the accompanying drawings, in which- Figure 1 is a sideelevation of a tappet constructed in accordance with my invention. Fig.2 is a top plan view of the same. Fig. 3 is a bottom plan view. Fig. 4is a longitudinal sectional view taken on the line 4 4 in Fig. 1, andFig. 5 is a transverse sectional view taken on the line 5 5 in Fig. 1.

Referring to the drawings by numeral, 1 denotes a portion of one of thestamp rods or stems of an ore-stamping mill, and 2 denotes a tappet ofusual form which is secured upon said rod by my improved fasteningmeans.

The substantially cylindrical body portion 3 of the tappet is formedwith a centrallydisposed longitudinally-extending channel or opening 4,through which the stamp-rod 1 extends concentrically with the tappet.The body portion 3 of the tappet has at each of its ends and at the endsof the said opening 4 recessed or cut-away portions 5, which formshoulders 6, the purpose of which will be presently explained, and ineach of the side walls 7 of the said opening 4 is formed a longitudinalgroove 8, which extends from end to end of said wall and opens into therecessed portions 5 of the tappet. In said side walls 7 ofthe opening 4are also formed longitudinal grooves 10, and transverse grooves 11 openat the outer edges of said walls and extend to the central portions ofthe grooves 10. In order to secure the stamp-rod' 1 in the opening 4, awedge-shaped gib 12 is provided in said opening 4 to engage said rod,and a Wedge-shaped key 13 is engaged with the grooves 8, so as to forcethe gib 12 into contact with the stamp-rod 1.

The key 13 is preferably inserted in the grooves 8 from the lower end ofthe tappet and is retained therein by a face-plate 14, which is adaptedto fit the recessed portion 5 at one of the ends of the tappet. This`faceplate is removably secured in the recesses 5 and in engagement withthe shoulder 6 by a screw 15, which is passed through a cross-bar 16 andinto a screw-threaded socket 17, formed in a boss or lug 18, locatedupon the inner face of the plate 14. The cross-bar 16, through which thescrew or bolt is passed, is removably mounted in or engaged with thesaid grooves 10. The ends of the cross-bar are of such size as to permitthem to be readily inserted in the grooves 10 through theclearance-grooves 11. It will be seen that when the screw or bolt 15 isturned in the proper direction the face-plate 14 will be drawn into therecesses 5 in the tappet and will be securely held therein for thepurpose of closing the lower end of the opening 4 and of retaining thewedge-shaped key 13 in position.

By providing the recessed portions 5 and the shoulders 6 at each end ofthe body of the tappet and by providing the T shaped grooves at thecenters of the walls -7 of the opening 4 it will be seen that the tappetis reversed-that is, either of its ends may be used, since theface-plate 14 may be secured at either of the ends of the tappet.

The construction, operation, and advantages of the invention will bereadily under stood from the foregoing description, takenin connectionwith the accompanying draw- 1n s.

' gIt will be seen that the device is of simple durable construction,that it will effectively secure a tappet upon the stamp-rod, and that itmay be readily removed without interfering with the usual guides of thestamp-rod 1.

Various changes in the form, proportion, and the minor details ofconstruction may be resorted to without departing from the principle orsacrificing any of the advantages of this invention.

IOO

IIO

Having thus described my invention, what I clairn as new, and desire tosecure by Letters Patent,'is-

In combination With a stamp-rod, a tappet thereon, having a radialopening to receive said rod and extending to one side of the tappet, thelatter being :further provided in the sides of said opening withlongitudinal grooves and transverse clearance-grooves communicatingtherewith and having recesses at the ends of said opening, a gib in saidopening7 bearing against one side of said rod, a Wedge in guides withWhich the sides of the opening are provided, said Wedge and gib beingreversely tapered and in contact With each other7 a face-plate in therecess at one end of the tappet and bearing against one end of theWedge, a cross-bar having its ends in the grooves in the sides of theopening, and a screw connecting said cross-bar to said face-plate,substantially as described.

In testimony whereof I have hereunto set my hand in presence of tWosubscribing Wit- DGSSGS.

WALLACE MCDONALD. Witnesses:

ALONZO McDoNALD, WILLIAM HOOKER.

